A South Side high school student planning to move to Iowa was shot and killed in the Gage Park neighborhood on Saturday evening, police and family members said.

Arrell Monegan, 16, stepped out of a gangway and was shot in the back and shoulder at about 7 p.m. in the 2400 block of West 58th Street, police said. The teen, who lived in the 7900 block of South Escanaba Avenue, died 90 minutes after the shooting at Mount Sinai Hospital.

Morgan said her brother traveled to the shooting scene about nine miles away from his home in the South Chicago neighborhood to have a conversation with a friend. When he emerged from a gangway, police said, he was shot by someone in a car.

The boy’s aunt, Tarina Monegan, is preparing to move to Iowa and had planned to take her nephew with her. They had just talked about adding his name to her lease.

“He was so much ready to leave Chicago because of the things going on,” Tarina Monegan said. “He never bothered anyone.”

Family members said they thought that Monegan's slaying was a case of mistaken identity. Chicago Police News Affairs Officer Veejay Zala didn’t have information on possible motives or suspects, but said the investigation was ongoing.

Another boy, 15, was shot Saturday afternoon in the Rogers Park neighborhood. He is recovering in good condition at an Evanston hospital, police said.

The 15-year-old was dropped off at North Shore University Health System in Evanston about 2:15 p.m. and told staffers he'd been shot at 1:15 p.m. at Pratt Boulevard and Clark Street, police said.

He was listed in good condition this afternoon with a gunshot wound to the shoulder area, police said. Police said he is not cooperating with investigators, who have verified he is 15 and is from Chicago.

Two of the four people shot Saturday afternoon were wounded in robberies.

A 27-year-old man was shot in the leg about 9:15 p.m. in the 4700 block of South Rockwell Avenue in the Back of the Yards neighborhood on the South Side. It's not clear what hospital he was taken to but police said he was in good condition.

About 2:30 p.m., a 22-year-old was shot during a robbery in the Austin neighborhood on the West Side. The man was shot in the 5000 block of West Chicago Avenue and taken to Mount Sinai Hospital in good condition, police said.